Should be fine. Are you using a Hot Fox pick-up? Might check to see how tall it is...
I know a couple people who just got 'plain' tanks that sit on bottom of the bed and then got a (CHEAP) plastic over-the-rails tool box and cut the bottom out - concealing the hoses, etc as well as plenty of space for other junk.
What are you planning to do for a conversion?
Oh yeah, the tank on my dually is 200gals with a Frybrid heated pick-up - there is nothing 'stealthy' about it though! Lol.
I am gathering everything to do Leons conversion with wvodesigns.com. i plan to use the hotfox or his raw power hotstick. i have not had much luck finding anyone with the tank setup i want to do. thinking now of buying one of the pickups and tanking it with me to northern tool and see how it fits